desktop-test build fail in freetype

[Jeff Johnson]

In lsb-freetype part of desktop-test, there is a tarball which which is
unpacked to build some tests. Turns out for this one location - not found by a
normal grep since it's in a .tar.gz - we see this stanza:

TESTLINK=-L../objs/.libs -Wl,-Bstatic `freetype-config --libs` -Wl,-Bdynamic
-lm

When pointed to the LSB edition of freetype-config, we see:

$ freetype-config --libs
-L/opt/lsb/lib64-5.0 -lfreetype -lz

So we're asking libfreetype and libz to be statically linked. That's not
correct since both are LSB libraries. Prior to the rework due to bug 3862,
lsbcc would just ignore this and turn them back into dynamic links anyway,
however after the rework, the Bstatic is honored, and now it's attempting
static linking using native .a libraries.

Buildbot builds variously failed based on the precise configruation of the
build slave but in any case this is not the effect we want.